Checking the wiring and component
- Ignition off
- Open the transmission control system.
Check the cable between transmission terminal #C (#A3) and solenoid STH terminal #A. Check the cable between transmission terminal #D (#A4) and solenoid STH terminal #B. Check these cables for a short-circuit to ground.
HINT: Check solenoid STH. Measure the solenoid STH resistance between terminals A and B. The resistance should be between 3-5 Ω.
Replace the cable harness if no fault is found in the solenoid or the terminals.
Other information:
- To open the transmission control system, For removal, see Removing gearbox side cover To install, see Installing the gearbox side cover .
- To connect the breakout box to the transmission connector, see Connecting the breakout box, GM automatic transmissions
- To replace solenoid STH, see Solenoid, line pressure, replacing
- To replace the cable harness, see Wiring harness / oil temperature sensor, replacing
- For information about signals, see Signal specification
- See Checking wiring and terminals. Permanent fault
- Continue
Refer to Resetting the adaptation